pg.ddx.io  pgsql-hackers@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: btree_gin and btree_gist for enums
Date: Sun, 26 Feb 2017 15:26:17 -0500
Message-ID: <19852.1488140777@sss.pgh.pa.us> (raw)
In-Reply-To: <8a9a7d1a-54e4-4d76-ddd6-f5a8f1829de3@2ndQuadrant.com>
References: <56EA8A71.8060107@dunslane.net>
	<56EACB8C.1040406@dunslane.net>
	<CAE2gYzyB=vyquQ2hEWA9UwNb=zYAKFsNO5vBtbfkV2=PzoPZjg@mail.gmail.com>
	<03f7d748-0f89-e8e1-094d-f04e1026b93d@dunslane.net>
	<27220.1478360811@sss.pgh.pa.us>
	<e60f50c4-899a-d48a-6cb4-4611acf2f73c@dunslane.net>
	<31412.1478366009@sss.pgh.pa.us>
	<60fb708c-8b3c-1337-934e-c1bfe2afc539@dunslane.net>
	<db2b70a4-78d7-294a-a315-8e7f506c5978@2ndQuadrant.com>
	<8258.1487886101@sss.pgh.pa.us>
	<4376a7bf-ab8c-e640-9021-94b148f9d733@2ndQuadrant.com>
	<6704.1487952174@sss.pgh.pa.us>
	<930cb563-6dc6-c4af-3be9-31f06c60361e@2ndQuadrant.com>
	<8a8c60b4-39c0-69a4-824c-e364f5fd97ea@2ndQuadrant.com>
	<fac3c5d1-ad66-3a15-c181-c7aadf1d6ad1@2ndQuadrant.com>
	<12734.1488042261@sss.pgh.pa.us>
	<4e730f28-742b-45e9-d507-4d292fbd7834@2ndQuadrant.com>
	<22791.1488047671@sss.pgh.pa.us>
	<c934ffff-c062-39d8-25a0-7157a3ecff49@2ndQuadrant.com>
	<8a9a7d1a-54e4-4d76-ddd6-f5a8f1829de3@2ndQuadrant.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-hackers>

Andrew Dunstan <andrew.dunstan@2ndquadrant.com> writes:
> This works for the btree_gin case. However, there's a difficulty for
> btree_gist - in the puicksplit routine the cmp function is passed to
> qsort() so there is no chance to pass it an flinfo to set up the call to
> the real comparison routine. Implementing a custom sort routine to work
> around the problem seems a bridge too far. I can;t think of an
> alternative off hand.

We already have qsort_arg ... can't you change it to use that?

			regards, tom lane


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers



view thread (39+ messages)  latest in thread

Message-ID: <19852.1488140777@sss.pgh.pa.us>
Permalink:  ../19852.1488140777@sss.pgh.pa.us/
Also on:    postgresql.org/message-id/19852.1488140777@sss.pgh.pa.us

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-hackers@postgresql.org
  Cc: tgl@sss.pgh.pa.us, andrew.dunstan@2ndquadrant.com
  Subject: Re: btree_gin and btree_gist for enums
  In-Reply-To: <19852.1488140777@sss.pgh.pa.us>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox